I do toner transfer so cant test milling but i think tqfp should be doable in milling aswell, as usual routing bits can go as low as 0.20-0.30 mm diameter (some even less ofc but i dont think it would be our case). Imo, dip or tqfp are the same in terms of diy, both doable, any differences would be rather minor. I would rather "think big" - i like the expression. Better to go with something thaby NoobMan - Controllers
I was checking for a force sensor to use for calibrating the height of the nozzle vs the table due to heat elongations and while looking at a few, dumb things came to my mind: - how about a senzor to detect the 3 axis movement as feedback? like an 3 axis accelerometer or some of those cheap sensors - i doubt anything would have the resolution to detect a missed step tho so utility of it would beby NoobMan - Controllers
Yes. I think that is called via. From the latin "road" or smth like that. These connect top and bottom traces. Just make sure you dont get any shorts with the wire. I do that myself alot, since im half blind and half brained Also there is a toner transfer version, single sided (sort of), of that board here However that requires specific tools and consumables.by NoobMan - Controllers
i guess you couldnt open the board file so i exported an image for you from the board file, maybe it helps you top traces are red, bottom are blueby NoobMan - Controllers
Triffid_Hunter Wrote: ------------------------------------------------------- > I made my own motherboard and my own firmware to > go with it. A significant portion of the really > interesting techniques and research have been done > on mostly custom machines. > > Basically you need a 3-axis CNC machine of some > description, a temperature-controlled extruder, a > 4-axisby NoobMan - Controllers
I think "no clean" fluxed are named so because they require no clealing, thus i only work with those and i personally dont really care if they leave small traces: because my electronics look ugly enough even when they are perfectly clean The ones that require washing are more agressive fluxes, i would say it shouldnt be needed normally. Afaik they clean with ipa or water, mostly depending if tby NoobMan - Controllers
If you can provide a little more than that, like a paper written schematic with components instead of logic operands and such, i can happily draw it in a few hours max with layout (even for toner transfer if needed). Packages and values can be played with after and could make it on a bigger grid to have it spaced out to tamper with later. But i am afraid i am more like an executant than a creatby NoobMan - Controllers
Because the solder iron is moved by hand, the "hand" is what matter quite alot, and each person feels comfortable himself in different situations, thus opinions will always be different. And opinions better be different, coz the alternative says that we would be just a nation of brainless robots. Generally soldering depends so much on own perspective that if you ask 10 ppls i think you probablyby NoobMan - Controllers
Check this its unipolar only, but has no h-bridges; could that become bipolar and without h-bridges can be back emf loop closed some other way? any benefits? I dont know, just asking your opinion. In the end, if we passed the "devil advocate" stage, i think its a great ideea. It just looks complicated to me tbh, as design goes. On the other hand i think it should be easy to test or further toby NoobMan - Controllers
Alot of peoples make their own drivers and electronics. However, you need some specific tools, consumables etc, even skills. If you are a passionate of electronics in general you probably have all that, and you know what to do and how to do it already. If you dont, there is no point buying 200$ + of tools, consumables and stuff to make a 20$ board or even1-2-3 boards a year.by NoobMan - Controllers
Well you said "any comments" ... I was merely trying to make something like defining the problem, see alternate paths, judge benefits value, something like that. Indeed home, as a chip feature, doesnt seem so widespread as reset, A4983 doesnt seem to have it like a3977 / a3979 do. The fact that not all chips have it would lower even further that "limited usefullness" of a feedback like that, woby NoobMan - Controllers
If the leds do flicker like in video, and if the motor coils are measured and putted correct, it basically should work i wish i knew that before making that wall of text - Enable pin: is the pin which tells the driver chip to block the motor or release it so it can move; if you read that page at Interface section it says pin number5: "5 Enable This pin allows you to turn the motor on and ofby NoobMan - Controllers
Its somewhat frequent that atx sources can get damaged in such a manner, that will still power up, will give some sort of juice out, but it wont be the right kind and its peripheral wouldnt start although you see the source fan blowing and assume its allright. One time i had 4 garbaged fried supplies like each with blown parts, and i spent some time on all of them connecting and replacing partsby NoobMan - Controllers
Any way i can see and edit the boards under windows ? xp that isby NoobMan - Next Wave Electronics Working Group
If its just about having some sort of feedback, to avoid errors, at some extent could be done with current electronics also. Also i think that some step errors can be considered "additive" while others are not such. What is the objective. Would that restrict the boards in some ways, would that depend on some extent on the pcb layout and, and how traces are laid at some extent, how far the motorsby NoobMan - Controllers
power resistor can be replaced by an "empowered" wire, just bridge it to on/off the psu (black to green) and it should power upby NoobMan - Controllers
I think the price diff should be even less than 15$, because the FT232RL is about 8-9 eur to me, and/or the UM232R module was around 25-30 eur; although the new "comm" chip atmega8U2 (on the new mega boards), that one is like 3 eur only. Judging the price in context, its my belief that using a chip with integrated features would / could be generally cheaper for the overall solution than otherwisby NoobMan - Next Wave Electronics Working Group
Btw do you have the GND and GNDA points near oscilator connected? The enable leds (led 2 and 3) for me are somehow dimmer than the other 2. I guess thats because are enable pins and the other two are phase pins of the bridges, and the chips were actually meant to run dc geared motor, and they ended getting hacked to run a stepper instead, but still cant quite figure it out exaclty why these ledsby NoobMan - Controllers
i guess the wiki page is a little older from a diff firmware but now yes it says T:0. only bend the pins of a termistor and connect them to extruder in their socket directly - run again and see what reports, put your finger on termistor and see if temp changes increases / drops etc. also go to extruder tab, try fan and heated bed and you should see the corresponding leds light up and off setby NoobMan - Controllers
That part in wiki needs to point to some ideal values +/- something. In a better / clearer way than it is now. Like amps ohms ~x,~y, the resulting voltage should be ~y (~z times lower than 12v and why), and how to choose a stepper that: - wont burn your extruder chip (like mine) and - will have acceptable temperature. The only orientative information there puts emphasis on torque, and that mayby NoobMan - Stepper Motors, Servo Motors, DC Motors
Well to say it first, the commercial cncs in all its forms, took decades to develop, and a reprap like that may not be ours to play with, but our children's. That doesnt mean we have to look the other way right now. Check out Fez cobra, has stacking shields up to 8, providing in total of 320 i/o. Emx module can be upgraded to like 256 Mb. Still low on pwm and low on analogue. I dont suggestby NoobMan - Controllers
Traumflug Wrote: ------------------------------------------------------- > Why single side? > > He asked for that. Sorry then. I was (still am) confused about what he means or wants to do. If i said something stupid, its only because i am fresh out of smart things to say.by NoobMan - Controllers
Why single side? Double side toner transfer is trivial. Print top and bottom. Put the 2 pieces of photo paper in front of a powerful light source. Register top and bottom, put scotch tape on 3 sides to hold it in place Insert the copper cald inside Iron the envelope between 2 sheets of paper so the scotch residues wont stick to iron Etch, clean, cover in solder, make legend, etc.by NoobMan - Controllers
SMD soldering was from the start accessible to any home guy with a soldering iron over 5 eur. All the pcbs in mendel, including extruder controller can be made from copper cald, with some eagle editing and some image editing, in simple toner transfer, double sided. And can be soldered entirelly with just soldering iron, no reflow or special smt needed, just a tweezer. Youtube is full of examplby NoobMan - Controllers
In general, its been said that 90% of any electronics troubleshooting comes from shorts, cold joint, solder points not done, etc. If you soldered yourself, some parts have pins that play as vias (connecting top and bottom), check those for a start. Identify if there is anything not done, maybe meter routes top to bottom to make sure. Check if the changes mentioned here are done properly. I tby NoobMan - Controllers
not sure if its right on topic, but i remember someone requesting info on epson print heads design, and recently stumbled around this link, so i thought to post it here maybe it would be of some interest at least Inside article there is a reference, to quote: "You can find detailed information on Epson head format in US patent 6758544 B2", which i think it is the one attached. Sorry if thisby NoobMan - Powder Printing and Selective Laser Sintering
I think it needs a jumper in the place of opto endstops to "cheat" it, telling mb that there is an opto endswitch and is not triggered. There should be some details on testing electronics page - the stepper driver part. To quote the wiki: Put a jumper on the stepper board where the MIN opto-switch will connect. It is across the top two pins as shown in the picture. This pretends to the controlby NoobMan - Sanguino(lolu)
Congratulations for this stage. Looks like a great work!by NoobMan - Controllers
I have been trying the same, to combine the boards for easier toner transfers, but i havent been able to figure out how to make it happen inside eagle (5.10). Maybe to start from one of the parts and import the other's schematic part by part, but that is kind of a long way to go. I just dont know how to "combine" boards. Just started with eagle on this project, to thicken the lines so layouts wouby NoobMan - Controllers
I am looking at the stepper driver that is now version 3.3, and i can notice that from version 3.1 the connectors for opto endstops or even mechanical endstops are not on the stepper drivers anymore. If i can make a board like that and use the min/max lines from the mb v 1.2, and basically ninja - steal the vcc and gnd from the stepper board ... would that work for endstops? Or steal it from thby NoobMan - Next Wave Electronics Working Group